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UNITED STATES PATENT Orricn JACOB MAOHER, OF OARLSTADT, NEW JERSEY, ASSIGNOR TO HIMSELF AND LOUIS WENTZ EL,

OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 238,045, dated February 22, 1881.

Application filed November 30, 1880.

To all whom it may concern:

Be it known that I, JACOB MACHER,OfGn1lstadt, in the county of Bergen, State of New Jersey, have invented a new and Improved At- 5 tachnient to Push-Pins of Watches, of which the following is a specification.

Heretofore the push-pins ot' stem-winding watches have been held in the pendant by a small screw passing through the pendant and this requires a very nice adjustment and loosens and fails to operate perfectly in a short time, requires very much care and accuracy in removing or replacing the push-pin, and mars the appearance of all elegant cases.

The object of my invention is to provide a new and improved attachment to the push-pin of stem-winding watches by means of which the push-pin is held in the pendant so that it can revolve on its longitudinal axis, and can be moved in the direction of its length, and can he removed or replaced very readily without unscrewing or detaching any parts.

The invention consists in a sleeve loosely mounted on the push-pin, and provided with a flange having a part of its entire thickness cut out on one side and a recess in its upper surface on the opposite side. The pendant is provided with a stud on the inner side, and the push-pin (a shoulder, or the lo werend ofwhich, rests upon the locking-spring of the case) is passed into the pendant in such a manner that the stud on the inner side of the pendant passes through the notch in the flange and the lock- 5 ing-spring is slightly depressed, upon which the pendantis turned half-way around, so that the stud will pass into the recess in the upper surface of the flange, and is held therein by the pressure of the locking-spring upon the 0 push-pin,thus holding the samein the pendant, but permitting it to be turned, as the collar is loosely mounted on the push-pin.

In the accompanying drawings, Figure 1 is a longitudinal section of the pendant. Fig. 2

is a cross-section of the same; Fig. 3, a horizontal section on the line 00 00, Figs. 1 and 2, showing the position of the sleeve while inserting the push-pin. Fig. 4 is a like section, showing the sleeve in the position it has while holding the push-pin in the pendant. Fig. 5

(No model.)

is a perspective view of a modification of the flanged sleeve.

Like letters indicate corresponding parts.

A sleeve, A, is loosely mounted on the pushpin 13, and has a flange, O, at the lower end, this flange having a part cut away throughout its entire thickness to form a notch, D, on one side, and has a recess, E, in its upper surface, on the side opposite to the one in which the notch D is. The sleeve A rests upon a screwcollar, F, which can be adjusted higher or lower on the threaded part G of the push-pin. A stud, H, projects from the inner side of the pendant- P, extending almost to the outer surface of the sleeve A. The lower squared end, J, of the pendant passes through an aperture in the upper end of the locking-spring K of the case, the shoulder L of the push-pin resting on this spring, as shown in Fig. 1; or, if a barrel-key or a push-pin without a key is used, the lower end ot'the pendant rests upon the end of the locking-spring K, as shown in Fig. 2.

In hunting'case watches, either key or stem winders, the locking-spring is used, as shown; but in open-face watches, either key or stem winding, a small spring will have to be inserted in the center M in place of the locking-springK.

The above-described device is to he used in hunting-case or open-face stem-winders, and it may also be used in hunting-case or openface key-winders, the barrel-key forming the lower end ofthe push-pin, which must be drawn out of the pendant whenever this key is to be used.

In place of having a recess, E, in the upper surface of the flange B, the same may be provided with two studs, N N, projecting from the upper surface of the flange at the ends of the notch E, as shown in Fig. 5.

The operation is as follows: To place the push-pin or key, which may be one of the va rious kinds described, into the pendant, it is passed into the same in the position shown in Fig. 3, the stud Hpassing through the notch E. The spring K will be slightly depressed thereby, and the upper surface of the flange will be below the stud H, and while in this position the push-pin is turned halfway around, and is then released. The spring K forces it upward and the stud H enters into the recess E, thus holding the push-pin in the pendant, for the bottom of the notch E strikes against the stud El and prevents the key or push-pin from being drawn out of the pendant. The sleeve A is also prevented from rotating by the stud H; but as this sleeveis loosely mounted on the push-pin or key the latter can be rotated at will. The spring K, pressing upward, prevents the push-pin or key from dropping sufticiently to allow the stud H to leave the recess E. To remoye the push-pin or key B the same is slightly pushed into the pendant, so that the stud H leaves the recess E, and then the push-pin Bis turned half-way around, and can be drawn out, as the pin H can then pass through the notch D.

Having thus described my invention, what 1 claim, and desire to secure by Letters Patent, is-

1. In a watch, a push-pin or key constructed,

substantially as herein shown and described, with a loosely-mounted sleeve having a notched and recessed flange, as and for the purpose set forth.

2. In a watch, the combination, with the pendant P, having a stud on the inner side, of a push-pin or key having a sleeve with anotched and recessed flange loosely mounted thereon, and of the case-looking spring or equivalent, substantially as herein shown and described, and for the purpose set forth.

3. In a watch, the combination, with the push-pin or key B, of the sleeve A, having a recessed and notched flange, (J, a" .1 of the screw-collar F, substantially as herein shown 35 and described, and for the purpose set forth.

' JACOB MAGHER.

Witnesses:

PATRICK MGGRANE, CHARLES UHL. 

